[action] [PR:15077] Move /var/log to RAM for Mellanox SN2700, Nokia 7215 and Dell S6100

[mssonicbld]

Why I did it

Move the /var/log on RAM. This is to prevent too many disk write on /var/log when mounted on disk.

Work item tracking

Microsoft ADO (number only): 17955517

How I did it

Pass kernel cmdline option "log_inram=on"

How to verify it

1. Mellanox SN2700

root@str-msn2700-02:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 791M 15M 776M 2% /run
root-overlay 15G 12G 2.9G 80% /
/dev/sda3 15G 12G 2.9G 80% /host
tmpfs 790M 12M 779M 2% /var/log
tmpfs 3.9G 107M 3.8G 3% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/f50948841bee041368bf7c0546ceab4c71f05951fb0ed5ae70411f28dde68907/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/c45de6c53e7185631a37e87686dd296b2585425f638aa92c720c90eae038480c/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/f5bc87d5c2965b21b222f09dd57fe0fc798e518101d7ecd25d170b7662ae3e80/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/b2f435a256b930da4897d8a096095dcce183a6efa55b5b637187a654db0585ee/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/5c3588e42b29fd0516a164c00de621b7a00236ecbb240c4d0b3903ec706c220d/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/5a4a2a2602fb4ed1d1df90c3916076f595b4d8bc18eb465dd23e33f354adcfb8/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/9926f7378de9223fd3e88c8f59d888ad178e2ca23fa978f372e9838f10b7b803/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/130abaf95cffc06d952adacb6aa54a2f5e7c54c81fa8c15184389e25a7884328/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/aeef95cf5af6e20909a4cfd6c696176cc5dcb31dd456cc8acbbd3d59d47333d7/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/ef9bb94012b9fe987e55c9b73141296da8081d258d0d134922776c3c4b3ec551/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/cf425d372b347fd68569f128e1771e5a70dbf504b2f013304d60bcef6dfbd0da/merged
overlay 15G 12G 2.9G 80% /var/lib/docker/overlay2/7a2592cdac5c7369a6a98e07dbf1c2d96d29634e7d7b593617c50cc7e09e5cb3/merged
root@str-msn2700-02:~# 
root@str-msn2700-02:~# free -h
 total used free shared buff/cache available
Mem: 7.7Gi 3.0Gi 3.3Gi 133Mi 1.5Gi 4.4Gi
Swap: 0B 0B 0B
root@str-msn2700-02:~# 


Dell S6100

root@str-s6100-acs-5:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 794M 15M 780M 2% /run
root-overlay 14G 9.9G 3.6G 74% /
/dev/sda4 14G 9.9G 3.6G 74% /host
tmpfs 793M 13M 781M 2% /var/log
tmpfs 3.9G 60K 3.9G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/f94441208fba5df49b0b8f0b49c699475ed0fd07673ab4a3eb574869b8e17c83/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/1c3dc3b582599602aec0dbd78945560f330f6244d2e218750622b3814dc53ed3/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/ab5b96e72e323fff5168abc69f8599fa244410d856dbd10cdbf73c99a4fe8d67/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/0e6e3adaba6bb1d2684da444661e540030d588ef498466b7d8ff773ce263a2ea/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/1218ed8bfa7a17c8927b20005d45f5e1e4a634e653d5c5c2057ac54713dc3387/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/b31486f665e5c929966185397990553fee6b41b515cbef28c945096673ac9bef/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/b984fa70f30bd1bac92bdf8d36542ed4433b4dabc33f7bb1f0a17a5eaee90f3e/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/b7866a1462768f3564b832187837c7a5e3d493b8084204e59610960cc5f6bc19/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/113bbbe88ee8452f4310b02a1343cfb4f1beb5fedf68a7d810ff5b5d7457c9f0/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/e7cc383186c6f9acecf2031c0c1f0870b8a7f63e1918b8359afa7a13d3c28963/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/c5d269100da205981c51e70e9e86facf69487f99e234dcdac822b8ab01af3d6a/merged
overlay 14G 9.9G 3.6G 74% /var/lib/docker/overlay2/463874ab78b2e45a34cf4d3d1cd2e45ff18c0abbf37be62d2c8559dce38d6219/merged
root@str-s6100-acs-5:~# free -h
 total used free shared buff/cache available
Mem: 7.8Gi 2.1Gi 4.1Gi 69Mi 1.6Gi 5.3Gi
Swap: 0B 0B 0B
root@str-s6100-acs-5:~# 

Nokia-7215

root@str-2-7215-acs-4:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 1.5G 0 1.5G 0% /dev
tmpfs 303M 14M 289M 5% /run
root-overlay 15G 7.2G 7.2G 51% /
/dev/sda2 15G 7.2G 7.2G 51% /host
tmpfs 302M 7.5M 295M 3% /var/log
tmpfs 1.5G 60K 1.5G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 4.0M 0 4.0M 0% /sys/fs/cgroup
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/617e49b8b8e4368db2b3b2fb3e3204e80ec572fe7981d67ad2116d9c3e4472f3/merged
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/c94b855482fc14aa1f032b0c8dc035b02f37ad9e4341cb5a8d22f14e14c63824/merged
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/2d8c6ee95b212bbc8376d15916723128455678f2a3c88f382b451bec88297341/merged
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/92114013a19dc19f30505ba645f961d50e093365422a9b22116ced1fa88ded2b/merged
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/c8e79a8403863887666324f163a4b6633c40c8b349402b3a0f40ba7e51adb28b/merged
overlay 15G 7.2G 7.2G 51% /var/lib/docker/overlay2/27fd4a51859f3febd345a8551a0b4686d696c205048e1d595b76114385a68949/merged
root@str-2-7215-acs-4:~# 

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211

Tested branch (Please provide the tested image version)

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[mssonicbld]

Original PR: #15077